Submission #1094483

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094483		modwwe	Port Facility (JOI17_port_facility)	C++17	22 / 100	943 ms	1048576 KiB

port_facility

#pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>
#define int long long
//#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".out","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
#define getchar_unlocked getchar

inline int scan()
{
    char c = getchar_unlocked();
    int x = 0;
    while (c < '0' || c > '9')
    {
        c = getchar_unlocked();
    }
    while (c >= '0' && c <= '9')
    {
        x = (x << 1) + (x << 3) + c - '0';
        c = getchar_unlocked();
    }
    return x;
}

void phongbeo();
const int inf = 1e17;
const int mod2 = 1e9 + 7;
const int  mod1 = 998244353;
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a, b, c;
};
struct id
{
    int a, b, c, d;
};
struct ie
{
    int a, b, c, d, e;

};

int n, m, s1, s2, s4, s3, sf, k, s5, s6, mx, s7, s8, s9, mx2, res, dem2 = 0, dem = 0, s33, dem3, dem4, l, r, mid, l2, r2, center;
int  i, s10, s12,k1,k2,s11;
int kk;
int el = 19;
main()
{
    if(fopen(task".inp","r"))
    {
        fin(task);
        fou(task);
    }
    NHP
    /// cin>>s1;
///modwwe
    phongbeo();
    // checktime
}
vector<int> v[100001];
ib a[100001];
int c[100001];
vector<int> v2[800001];
bool cmp(ib a,ib b)
{
    return a.a<b.a;
}
void dfs(int x)
 {
     for(auto f:v[x])
     {
          if(c[f]==c[x]){cout<<0; exit(0);}
         if(!c[f]){
        c[f]=3-c[x];
        dfs(f);
        }
     }
 }
 void upd(int node,int l,int r,int l1,int r1,int x)
  {
      if(l>r1||r<l1) return;
       if(l>=l1&&r<=r1)
       {
            v2[node].pb(x);
            return;
       }
       int mid=l+r>>1;
        upd(node<<1,l,mid,l1,r1,x);
        upd(node<<1|1,mid+1,r,l1,r1,x);
  }
  void get(int node,int l,int r,int l1,int x)
   {
       for(auto f:v2[node])
        v[x].pb(f),
        v[f].pb(x);
     if(l==r) return;
     int mid=l+r>>1;
      if(l1<=mid)get(node<<1,l,mid,l1,x);
      else get(node<<1|1,mid+1,r,l1,x);
   }
void phongbeo()
{
     cin>>n;
     for(int i=1;i<=n;i++)
         cin>>a[i].a>>a[i].b;
sort(a+1,a+1+n,cmp);
 for(int i=n;i>=1;--i)
 {
     get(1,1,n*2,a[i].b,i);
     upd(1,1,n*2,a[i].a,a[i].b,i);
 }
     s4=1;
     for(int i=1;i<=n;i++)
     if(!c[i])
     {
         c[i]=1;
         s4=(s4<<1);
         if(s4>=mod2)s4-=mod2;
         dfs(i);
     }
     cout<<s4;
}

Compilation message (stderr)

port_facility.cpp:67:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   67 | main()
      | ^~~~
port_facility.cpp: In function 'void upd(long long int, long long int, long long int, long long int, long long int, long long int)':
port_facility.cpp:107:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  107 |        int mid=l+r>>1;
      |                ~^~
port_facility.cpp: In function 'void get(long long int, long long int, long long int, long long int, long long int)':
port_facility.cpp:117:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  117 |      int mid=l+r>>1;
      |              ~^~
port_facility.cpp: In function 'int main()':
port_facility.cpp:12:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 | #define fin(x) freopen(x".inp","r",stdin)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
port_facility.cpp:71:9: note: in expansion of macro 'fin'
   71 |         fin(task);
      |         ^~~
port_facility.cpp:13:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | #define fou(x) freopen(x".out","w",stdout)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
port_facility.cpp:72:9: note: in expansion of macro 'fou'
   72 |         fou(task);
      |         ^~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22